Geometrical parameter analysis of a high-sensitivity fiber optic angular displacement sensor

João M.S. Sakamoto, Gefeson M. Pacheco, Cláudio Kitano, Bernhard R. Tittmann

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


In this work, we present an analysis of the influence of geometrical parameters on the sensitivity and linear range of a fiber optic angular displacement sensor, through computational simulations and experiments. The geometrical parameters analyzed are the lens focal length, the gap between fibers, the fiber cladding radii, the emitting fiber critical angle (or, equivalently, the emitting fiber numerical aperture), and the standoff distance (distance between the lens and the reflective surface). Besides, we analyze the sensor sensitivity regarding any spurious linear displacement. The simulation and experimental results show that the parameters that play the most important roles are the emitting fiber core radius, the lens focal length, and the light coupling efficiency, whereas the remaining parameters have little influence on the sensor characteristics.

Original languageEnglish (US)
Pages (from-to)8436-8443
Number of pages8
JournalApplied optics
Issue number36
StatePublished - Dec 20 2014

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering


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